A warm summer day, a trip to the playground, or an afternoon at the lake—and suddenly your child seems unusually tired, complains of a headache, or just wants to be held. Many parents then wonder: Is it just the heat, or is it already a sunstroke or overheating?

In most cases, heat-related issues can be recognized early and treated well. It is crucial to take the warning signs seriously and get your child out of the sun in time.

Why are children more sensitive to heat?

Babies and young children cannot regulate their body temperature as well as adults.

Additionally:

  • they sweat less effectively,
  • lose fluids more quickly,
  • often cannot express their thirst,
  • and rely on adults to protect them from sun and heat.

This makes them more prone to overheating.

What is the difference between overheating and sunstroke?

Both conditions are caused by heat but have different origins.

Overheating

Overheating occurs when the body becomes too warm overall—due to high outside temperatures, warm clothing, or lack of fluid intake.

Sunstroke

Sunstroke is mainly caused by intense sun exposure on the head and neck. This irritates the meninges, even if the body temperature is not necessarily very high.

Both can occur simultaneously.

What symptoms can occur?

Depending on the cause and severity, children show different symptoms.

Possible signs include:

  • red, hot face,
  • warm or hot skin,
  • extreme tiredness,
  • headaches,
  • nausea or vomiting,
  • dizziness,
  • irritability,
  • unusual restlessness,
  • reluctance to drink.

In babies, additional signs may include:

  • shrill crying,
  • lethargy,
  • poor drinking performance,
  • unusual sleepiness.

What should you do immediately?

If you suspect your child is overheated or may have sunstroke:

  • get them out of the sun immediately,
  • find a cool or shaded place,
  • remove excess clothing,
  • offer small amounts of fluids regularly,
  • gently cool the body with lukewarm, damp cloths,
  • let your child rest.

Ice-cold water or very cold compresses are not advisable, as they can further stress the body.

When should you seek immediate medical help?

Seek medical help immediately or call emergency services (112) if your child:

  • is barely responsive,

  • loses consciousness,

  • vomits repeatedly,

  • develops seizures,

  • has severe neck pain,

  • experiences breathing problems,

  • develops very high fever.

  • or if the condition rapidly worsens.

These symptoms may indicate a serious heat-related illness and require immediate treatment.

When should you contact the pediatrician?

A pediatric examination is advisable if:

  • Headaches or nausea persist,
  • Your child seems unusually tired,
  • They are reluctant to drink,
  • Fever develops,
  • You are unsure if the symptoms are truly caused by the heat.

Especially for babies, a quick medical assessment is necessary if they seem unwell after being in the sun.

How to prevent heat issues

Children don't have to miss out on playing or being active in the summer. With a few simple measures, the risk can be significantly reduced.

Helpful tips include:

  • Avoid direct midday sun as much as possible,
  • Ensure plenty of fluids are consumed,
  • Choose light, airy clothing,
  • Wear a hat with neck protection,
  • Regularly seek shade,
  • Never expose babies to direct sunlight,
  • Never leave children alone in a parked car – not even for a few minutes.

Closed vehicles can become dangerously hot in a short time.

What you should know

Children are much more sensitive to heat than adults. Fatigue, headaches, or nausea after sun exposure should be taken seriously. Usually, symptoms improve quickly if your child is cooled down, drinks enough fluids, and can rest. If warning signs like confusion, repeated vomiting, or seizures occur, your child needs immediate medical help.